Conductor Jeffrey Kahane will have some big shoes to fill when he takes over as musid director of the Colorado Symphony next fall. For better or for worse, the CSO has been identified for a decade as Marin Alsop’s orchestra, due in large part to Alsop’s blossoming international reputation over those years. Kahane may not be as outsized a personality as Alsop, but he has some definite ideas about where his new orchestra needs to go. “One thing is the way in which the orchestra is central to the life of a community. That the orchestra is not just there to entertain, although that’s part of what we do, but to provide a sort of spiritual core to the cultural life of the community.”